MAZ21800AG Equivalent & Substitute Parts

Part Overview

The MAZ21800AG is a Zener diode manufactured by Panasonic Electronic Components, rated for 18 V nominal voltage and 1 W maximum power dissipation in a through-hole DO-41 axial package. This component is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility across voltage regulation, power handling, and thermal characteristics while accommodating modern supply chain availability.

Substiute Parts

MAZ21800AG

Panasonic Electronic ComponentsIn Stock: 1087MAZ21800AG Datasheet

Current PartRFQ

1N4746A,113

Nexperia USA Inc.In Stock: 1254071N4746A,113 Datasheet

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1N4746AP/TR8

Microchip TechnologyIn Stock: 10941N4746AP/TR8 Datasheet

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1N4746ATR

onsemiIn Stock: 273761N4746ATR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAZ21800AG is determined by strict equivalence across the following electrical and mechanical parameters:

Primary Equivalence Criteria:

• Voltage - Zener (Nominal): 18 V
• Power - Maximum: 1 W
• Mounting Type: Through Hole
• Package / Case: DO-41 or DO-204AL (axial configuration)

Secondary Compatibility Parameters:

• Impedance (Maximum): Substitute values up to 20 Ohms are acceptable (original specification: 15 Ohms maximum)
• Tolerance: Substitute tolerance of ±5% is acceptable (original specification: ±6%)
• Current - Reverse Leakage: 5 µA at specified reverse voltage
• Voltage - Forward (Maximum): Substitute values up to 1.2 V @ 200 mA are acceptable (original specification: 1 V @ 200 mA)

All identified substitute parts meet or exceed the primary equivalence criteria and fall within acceptable ranges for secondary parameters. Substitutes are available from active manufacturers with current production status and improved supply chain availability compared to the obsolete MAZ21800AG.

Parameter Comparison

Engineering Selection Recommendations

1N4746A,113 (Nexperia USA Inc.)

This substitute is recommended for applications requiring RoHS3 compliance and extended temperature range operation. The part is active in production with substantial inventory availability (125,300 pcs). Tolerance specification of ±5% provides tighter voltage regulation compared to the original ±6%. Operating temperature range extends to -65°C, providing broader environmental compatibility. Impedance specification of 20 Ohms is within acceptable substitution parameters.

1N4746AP/TR8 (Microchip Technology)

This substitute provides direct electrical equivalence with identical voltage and power ratings. The part is active in production with current inventory (1,054 pcs). Operating temperature range is limited to -65°C ~ 150°C, which is lower than the original 200°C maximum. This part is RoHS non-compliant and should be selected only for applications where RoHS compliance is not required. Tape & Reel packaging format is suitable for automated assembly processes.

1N4746ATR (onsemi)

This substitute is recommended for applications requiring maximum temperature operation and RoHS3 compliance. The part is active in production with high inventory availability (27,300 pcs). Operating temperature range matches the original specification at -65°C ~ 200°C. Moisture Sensitivity Level is listed as Not Applicable, indicating robust handling characteristics. Cut Tape packaging format is suitable for manual or semi-automated assembly.

Frequently Asked Questions (FAQ)

Q: Can the MAZ21800AG be directly replaced with any of the listed substitutes?

A: Yes. All listed substitutes (1N4746A,113, 1N4746AP/TR8, and 1N4746ATR) meet the primary equivalence criteria of 18 V nominal voltage, 1 W maximum power, and DO-41 through-hole axial package configuration. Electrical parameters fall within acceptable substitution ranges.

Q: What is the significance of the ±5% tolerance in substitute parts versus the ±6% tolerance of the original?

A: The ±5% tolerance specification in substitute parts represents tighter voltage regulation compared to the original ±6% specification. This provides improved voltage accuracy and is considered a compatible substitution parameter. Applications requiring the original ±6% tolerance can utilize parts with ±5% tolerance without functional degradation.

Q: Are there temperature limitations when substituting the MAZ21800AG?

A: The 1N4746AP/TR8 (Microchip) has a maximum operating temperature of 150°C, which is lower than the original 200°C specification. This part should not be selected for applications requiring operation at temperatures above 150°C. The 1N4746A,113 (Nexperia) and 1N4746ATR (onsemi) both support the full 200°C maximum temperature range.

Q: What packaging formats are available for the substitute parts?

A: The 1N4746A,113 is supplied in Cut Tape (CT) format. The 1N4746AP/TR8 is supplied in Tape & Reel (TR) format. The 1N4746ATR is supplied in Cut Tape (CT) format. All three maintain the DO-41 axial through-hole package configuration compatible with the original MAZ21800AG.

Q: Which substitute part offers the best compliance certifications?

A: Both the 1N4746A,113 (Nexperia) and 1N4746ATR (onsemi) are ROHS3 compliant with REACH Unaffected status. The 1N4746AP/TR8 (Microchip) is RoHS non-compliant and should be selected only for applications where RoHS compliance is not a requirement.

Q: What is the impedance difference between the original and substitute parts?

A: The original MAZ21800AG specifies a maximum impedance of 15 Ohms. All substitute parts specify a maximum impedance of 20 Ohms. This 5 Ohm increase is within acceptable substitution parameters and does not affect functional compatibility in standard voltage regulation applications.

Q: How does the forward voltage specification differ in the substitutes?

A: The original MAZ21800AG specifies a maximum forward voltage of 1 V @ 200 mA. The 1N4746A,113 and 1N4746AP/TR8 specify 1.2 V @ 200 mA. This 0.2 V increase is within acceptable substitution parameters. The 1N4746ATR does not provide a forward voltage specification in the available data.